This is Host Based IDS System which comes in a Server/Client model. You have a server and you install clients on all your workstations. So you get the Host based IDS System and for monitoring/deploying you can use the Server.

Cisco Secure Access Control Server:

This is an Authentication Server which supports TACACS+ and RADIUS. It is more versatile and integrates very well with different Cisco Management Products. Dynamic downloading of ACL based on user login etc are some great features.

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This is Host Based IDS System which comes in a Server/Client model. You have a server and you install clients on all your workstations. So you get the Host based IDS System and for monitoring/deploying you can use the Server.
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Again thanks Rajesh

If I have got cisco IDS (4215) as stand alone device, within my network, is there any need to use Cisco Security Agent (Host Based IDS) ?

Both serves its own purpose Zillah. For example, most of the times a *well placed* Network IDS like 4215 would suffice. But if you are running 4.x code on it you'll only get detection. But CSA is a host based IPS, it will prevent it as well.

A well organized company will have enough security configurations for the workstations (like user not being in administrator group, well maintained Group Policy etc.) In such cases NIDS is enough.

But if that is not the case, then I would recommend for CSA, since it will do a better job. If you want to try out you can I guess, just see if you like the behavior and you'll come to know.

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